Major League Baseball implemented the ABS challenge system for the 2026 season, which allows players to challenge a ball or strike call made by the plate umpire. Each team receives two challenges to start the game, and only batters, pitchers and catchers can challenge a call. If a team wins a challenge, it can keep challenging. If a team challenges incorrectly twice, it loses its challenges for the rest of the game.
Here are the ABS challenge system rankings for batters, catchers, teams and umpires for the 2026 MLB season.
Data updated through Wednesday, July 8.
Batter ABS Challenge Leaders Catcher ABS Challenge Leaders MLB Team ABS Challenge Rankings Umpire ABS Challenge Leaders Rank Name Challenged Overturned Overturn% P 1 Derek Thomas 48 16 33.3% 3311 1 Louie Krupa 36 12 33.3% 2334 3 Dexter Kelley 44 16 36.4% 2927 4 Dillon Wilson 16 6 37.5% 1760 5 Emil Jimenez 54 21 38.9% 4363 6 Edwin Jimenez 28 11 39.3% 2458 7 John Libka 46 19 41.3% 4606 8 Scott Barry 53 22 41.5% 4578 9 James Jean 55 23 41.8% 4685 10 Nic Lentz 74 31 41.9% 5411 11 Austin Jones 52 22 42.3% 3837 12 Mark Ripperger 79 34 43.0% 5734 13 David Rackley 67 29 43.3% 5342 14 Alex Tosi 62 27 43.5% 5051 15 Jonathan Parra 32 14 43.8% 2487 16 Shane Livensparger 59 26 44.1% 4350 17 Will Little 72 32 44.4% 5041 18 Jansen Visconti 65 29 44.6% 4630 19 Erich Bacchus 52 24 46.2% 4851 20 Chris Conroy 60 28 46.7% 4596 21 Adam Beck 81 38 46.9% 5378 22 Vic Carapazza 74 35 47.3% 5934 22 James Hoye 74 35 47.3% 5216 24 Mark Wegner 76 36 47.4% 5737 24 Quinn Wolcott 76 36 47.4% 5602 24 Adam Hamari 57 27 47.4% 5245 27 Tom Hanahan 70 34 48.6% 5071 28 Tyler Jones 53 26 49.1% 3394 29 Nate Tomlinson 63 31 49.2% 5345 30 Jeremie Rehak 71 35 49.3% 4796 30 Jordan Baker 71 35 49.3% 5188 30 Ryan Wills 71 35 49.3% 4873 33 Edwin Moscoso 77 38 49.4% 5149 34 Ryan Additon 95 47 49.5% 5526 35 D.J. Reyburn 70 35 50.0% 4532 35 Tripp Gibson 64 32 50.0% 5445 35 Nick Mahrley 52 26 50.0% 4261 35 Steven Jaschinski 44 22 50.0% 2814 39 Nestor Ceja 71 36 50.7% 5128 40 Ryan Blakney 67 34 50.7% 4846 41 Carlos Torres 59 30 50.8% 4825 42 Dan Merzel 75 39 52.0% 5053 43 John Tumpane 76 40 52.6% 5165 44 Brennan Miller 64 34 53.1% 5037 45 Alan Porter 71 38 53.5% 4821 46 Ben May 56 30 53.6% 4836 47 Sean Barber 80 43 53.8% 5006 48 Chris Guccione 83 45 54.2% 5071 49 Chad Fairchild 68 37 54.4% 4667 50 Gabe Morales 60 33 55.0% 4325 51 Brock Ballou 49 27 55.1% 3434 52 Clint Vondrak 56 31 55.4% 4489 53 Junior Valentine 70 39 55.7% 5045 54 Brian O'Nora 50 28 56.0% 3342 54 Jen Pawol 50 28 56.0% 2921 56 Mike Muchlinski 64 36 56.3% 4998 56 Bruce Dreckman 80 45 56.3% 5297 58 Bill Miller 74 42 56.8% 5078 59 Doug Eddings 71 41 57.7% 5105 60 Jim Wolf 67 39 58.2% 4354 60 Roberto Ortiz 67 39 58.2% 4470 62 Chad Whitson 65 38 58.5% 4584 63 Cory Blaser 70 41 58.6% 4638 64 Ramon De Jesus 73 43 58.9% 4388 65 Willie Traynor 61 36 59.0% 5559 66 Alfonso Márquez 66 39 59.1% 4845 66 Marvin Hudson 44 26 59.1% 3616 66 Charlie Ramos 66 39 59.1% 3454 69 Hunter Wendelstedt 93 55 59.1% 5135 70 Mike Estabrook 71 42 59.2% 4775 71 Paul Clemons 64 38 59.4% 5211 72 Rob Drake 69 41 59.4% 5139 73 Malachi Moore 89 53 59.6% 5516 74 Laz Diaz 87 52 59.8% 5286 75 Dan Bellino 78 47 60.3% 5218 76 Chris Segal 76 46 60.5% 4749 77 Lance Barrett 94 57 60.6% 5337 78 Ron Kulpa 56 34 60.7% 3332 79 Jacob Metz 51 31 60.8% 2914 80 Alex MacKay 74 45 60.8% 4973 81 Lance Barksdale 78 48 61.5% 4960 82 Manny Gonzalez 77 48 62.3% 4689 82 Stu Scheurwater 77 48 62.3% 5010 84 Adrian Johnson 54 34 63.0% 3370 84 Felix Neon 27 17 63.0% 1186 86 John Bacon 49 31 63.3% 2526 87 Dan Iassogna 88 56 63.6% 5427 88 Brian Walsh 71 46 64.8% 4368 89 Todd Tichenor 61 41 67.2% 4470 90 Andy Fletcher 52 38 73.1% 3357 91 CB Bucknor 9 7 77.8% 674
